1242130343 has 2 divisors, whose sum is σ = 1242130344. Its totient is φ = 1242130342.

The previous prime is 1242130333. The next prime is 1242130361. The reversal of 1242130343 is 3430312421.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242130343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242130333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621065171 + 621065172.

It is an arithmetic number, because the mean of its divisors is an integer number (621065172).

Almost surely, 2^1242130343 is an apocalyptic number.

1242130343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242130343 is an equidigital number, since it uses as much as digits as its factorization.

1242130343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1242130343 is about 35243.8695803965. The cubic root of 1242130343 is about 1074.9519626632.

Adding to 1242130343 its reverse (3430312421), we get a palindrome (4672442764).

The spelling of 1242130343 in words is "one billion, two hundred forty-two million, one hundred thirty thousand, three hundred forty-three".